Process for the manufacture of perfluoro-alkoxy-propionic acid fluorides
CA 1080253 A · Owner: Hoechst Aktiengesellschaft · Inventors: Martini, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: Perfluoro-alkoxy propionic acid fluorides may be obtained by reacting hexafluoro-propene epoxide with a perfluorocarboxylic fluoride in an aprotic polar solvent in the presence of a N,N,N',N'-tetrasubstituted diaminodifluoromethane as catalyst. The compounds obtained may be used as starting products for valuable perfluoro ethers which are highly inert towards heat or aggressive chemicals, such as fluorine.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.